Improvement in metallic cartridges



W. TIBBALS.

Cartridge. No. 90,607. Patented May 25, 1869.

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WILLIAM TIBBAES, OF SOU'lHv-CO-VENTRY, CONNECTICUT.

Letters Patent No. 90,607, :lated ay 25, 1869.

,IMPROVEMENT IN METALLIC CARTRIDGES.

To all whom it may concern:

Be it known that I, W1LLIAM-Cll-IBBALS, of South Coventry, in the countyof lolland, and State'` ot' Cou-` necticut, have invented certain newand useful Improvements in .the Construction ol' Metallic Cartridge-Cases; and l do hereby declare that the following is a clear, full, and.exact description thereof, reference being had to the accompanyingdrawings, makingv part of this specification, and to the letters ofreference marked thereon, like letters indicating like parts whereverthey occur. a g

Figures 1 and 3 represent longitudinal sectionsv of my improvedcartridge-case,`-coinplete.- d

Figures? and 4 represent,infperspective, the-:cup det-ached from thecase. 1 l In the manufacture ofthe' ordinary metallic ca tridge-case,the metal is first cut o'ut in the form of a;

disk, by a punch, afterwhich it is .forced through'a hole in a die ofless diameter than the disk,-which turns up the edge all around, 4andthereby forms it into a cup similar in form that shown iu lig. 4. 1t isthen repeatedly forced through other dies orV holes, each successive onebeing less in diameter than the preceding one, whereby the sides of thecup are elongated, the diameter of the cup being reduced at each step inthe operation, until it is finally brought to the required size, both'in length and diameter, it then `being in the form of a plaincylindrical tube, havingY Aone end closed.- It is then placed in a die,having a4 recess in its upper face of proper size to formthe ange, andthe flange is formed therein by pressing down the closed end of the`tube, causing the metal to bend and spread out radially all around,- thecase then being in the form represented by A, in the drawgAt eachoperation of drawing the case, the metal @becomes hardened, and renderedbrittle, and it is necessary, therefore, to anneal it at various stagesof the process, notwithstanding which fact, it frequently happens that,in crushing down the metal ta form the ange, the metal becomes crackedor fractured, and

oftentimes it is impossible to detect the defect until the cartridge isused, when it bursts at the flange, permitting the escape of the gas,and endangering the eye-sight, or even life, of the person firing thegun. This is more especiall-y the case in .cartridges made for militaryarms, in which a heavy charge of powder is used. To remedy this defectis the object of my present invention, and to accomplish this object, Imake a cup, B, ot' such a diameter as to lit within the case A, andinsert it therein, as shown in figs. 1 and 3.

' This cup, when used in a case having the fulminate placed,` in theflange, may bc made with a large hole at the centre of its base, asrepresented in g. 2, the fire from the fulminate, in suchcase, passingfrom the flange to, and through this"hole,aud thus igniting thepowdervwithin the case.

tial-fire' cartridge, or one having thc fulminate located at the centreot' the base, i-u whichucase the cup will serve as an anvil, the cupwillv be iliade with two or more small holes a. in its base, as shown iu4,

the centre, so as to leave a portion of the base, di-

passing t charg. When used as a central-tire cartridge, the

cup must be secured in the case with sutlicient firmlness to hold 4itin-place,'and resist the .blow of the hannneror liringfpin, which may beeffected either fhynforcing the cup in .very tight and snug, or byindenting the case A, directly over the `upper edge of the case. g l

When the powdereis ignited, the gas formed by its combustion will press'upon the inner side of the cup, and force it outward, tight against thesurrounding walls of the case A, the same as it forces and holds thecase tselt'egainst the surrounding-walls of lthe barrel, and will thusexert its force upon the cup B,

and kthereby relieve the flange -of 'the strain that strong to wi centlyconstructed and improved fire-arms. l

I am aware that a cartridge-case has been made, composed of thinmaterial wrapped on a former, and having its end formed by crimping orfolding over the wrapper, and then completing it by the addition of adisk, or cup, of pasteboard, asin the patent of Rod'- nian and Crispin,of December 15, 1863; and I am also aware that a similar case has beenmade in which it was proposed to use a cup of pasteboard, metal, orelastic material to complete the end, as in the patent of S. Crispin,August 8, 1865, and, therefore, I do not claim such; buthaving thusdescribed my invention,

The cup, or reinforce B, when inserted within the flanged metallic caseA, in such a manner as to cover and protect the Hange, substantially asdescribed.

' I WM. T-IBBALS.

Witnesses:

When 'it is desired to make what is known as a cen W. A. Looms, Guo. A.Hints.

the holes a. being located-a short distance awayiion'irect-ly at thecentre, solid, to serve as an anvil, againstwhich'the fulminate may becrushed, by a blow upon. the centre of the base of thelcase, externally,the lire hrough the lholes a," and thus igniting the necessary to'beused, and, atthe saine time, occupies l so little space thatthe caseneed not' be perceptibly.- increased. in sizefor' length, and thislatter isafvery .important consideration, especially in guns using -aflargefcharge ofA powder and having a smallicalibre, or bore,`as isnow'becomiug the practice .in 'the more re'-

